CVE-2021-33828 json
The files_antivirus component before 1.0.0 for ownCloud mishandles the protection mechanism by which malicious files (that have been upload…
published 2022-01-15 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-20503
- cvss
- 8.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.2%
- EPSS 1.2% chance of exploitation in 30 days, percentile 68%
- public exploits
- 0
- none known
Summary
The files_antivirus component before 1.0.0 for ownCloud mishandles the protection mechanism by which malicious files (that have been uploaded to a public share) are supposed to be deleted upon detection.
Patch / fix
- owncloud files_antivirus 1.0.0
Exploit prediction
1.19% chance of exploitation in the next 30 days, higher than 68% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 6.5 | AV:N/AC:L/Au:S/C:P/I:P/A:P |
Classification
- Weakness
-
- CWE-434 Unrestricted Upload of File with Dangerous Type
References
-
doc.owncloud.com
/server/admin_manual/release_notes.html
release-notes, vendor-advisory
-
owncloud.com
/security-advisories/cve-2021-33828/
vendor-advisory
Sources
- CVE List CVE-2021-33828
- NVD CVE-2021-33828
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.